High-durability maintenance channel for bridge and mounting method of high-durability maintenance channel

Abstract

The invention provides a bridge high-durability type maintenance channel and an installation method thereof, and the maintenance channel comprises a plurality of embedded parts which are used for being embedded in a bridge pier; the supports are connected with the bridge pier through the embedded parts, each support comprises a vertical support and a horizontal support, one end of each horizontal support is connected with the middle of the corresponding vertical support, the other end of each horizontal support is connected with the corresponding embedded part, and the bottom end of each vertical support is connected with the corresponding embedded part; the sidewalk step plate is laid on the upper surface of the horizontal brace; the horizontal handrails are used for being mounted on the vertical supports; the supports and the embedded parts, the vertical supports and the horizontal supports, and the horizontal railings and the vertical supports are connected through assembly type insertion connection structures. The problems that in the prior art, a maintenance channel is poor in corrosion resistance, complex in installation, large in dead weight and high in safety risk can be solved.

Description

Technical Field

[0001] This invention relates to the field of bridge engineering ancillary facilities technology, specifically to a high-durability bridge maintenance access and its installation method. Background Technology

[0002] During long-term service, bridges experience a gradual decline in structural performance due to various factors such as construction defects, material degradation, extreme loads, and accidental accidents. To ensure the safe operation of bridges, regular inspection, maintenance, repair, and reinforcement are essential. Inspection access routes, as indispensable ancillary facilities for bridges, provide necessary safe space for maintenance personnel to perform inspection work at critical locations such as beam ends, supports, and prestressed anchorage zones.

[0003] Currently, most existing bridge maintenance access roads are constructed using steel or concrete structures, which are typically secured through extensive on-site welding and bolting. In practical use, these traditional structures reveal numerous defects: welds are prone to incomplete welds and corrosion; bolted connections are susceptible to loosening and misalignment under vibration loads; the materials themselves also experience aging; and especially in highly corrosive environments such as the marine atmosphere, steel structures corrode rapidly, and concrete railings weather severely, resulting in short service lives, reduced load-bearing capacity, and seriously impacting the safety of maintenance work. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a high-durability bridge maintenance access and its installation method.

[0005] The specific technical solution is as follows: A high-durability maintenance access road for bridges includes: If the embedded parts are to be used, they are to be pre-embedded on the bridge piers; Several supports are provided, which are connected to the bridge piers through the embedded parts. Each support includes a vertical brace and a horizontal brace. One end of the horizontal brace is connected to the middle of the vertical brace, and the other end is connected to the embedded part. The bottom end of the vertical brace is connected to the embedded part. Pedestrian walkway treads, for laying on the upper surface of the flat brace; and A horizontal railing for installation on the vertical support; The bracket and the embedded part, the vertical support and the horizontal support, and the horizontal railing and the vertical support are all connected by a prefabricated plug-in structure.

[0006] Optionally, the support frame and / or sidewalk treads are made of composite materials.

[0007] Optionally, the composite material is a sandwich structure or a reinforced structure; the sandwich structure includes an outer reinforcing layer of metal and an inner filling layer of rigid polyurethane foam; the reinforced structure includes an outer covering layer of fiber-reinforced composite material and an inner reinforcing layer of metal sheet.

[0008] Optionally, the vertical support has a bent structure.

[0009] Optionally, the embedded parts include vertical support embedded parts and horizontal support embedded parts. The bottom of the vertical support is inserted into a vertical support embedded part, and one end of the horizontal support is inserted into a horizontal support embedded part, while the other end passes through and is inserted into a through hole opened in the middle of the vertical support.

[0010] Optionally, a transition sleeve is provided at the connection between the horizontal brace and the vertical brace to reduce local stress.

[0011] Optionally, components made of adjacent composite materials are connected by internal connectors and rivets.

[0012] Optionally, the sidewalk paving stones are spliced ​​together from several straight-edge segments and curved segments, and laid in a circumferential manner to form a runway-shaped structure.

[0013] An installation method for a high-durability bridge maintenance access road as described above includes the following steps: Includes the following steps: S1: Install and fix the embedded parts onto the bridge pier; S2: Insert the vertical and horizontal supports of the bracket into the embedded parts in sequence, and connect and fix the vertical and horizontal supports to complete the bracket installation; S3: Lay the sidewalk treads and fix them on the flat support of the bracket; S4: Pass the horizontal railing through and fix it to the vertical support of the bracket.

[0014] Optionally, when the support and sidewalk treads are made of composite materials, the manufacturing process includes: bending the metal pipes according to the design, preheating and then pouring polyurethane resin, and after the resin has foamed and cured, cutting and processing the connecting holes according to the design length.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The modular, prefabricated design replaces extensive on-site welding and bolting with plug-in connections. This simplifies the connection process, improves installation efficiency and precision, and fundamentally reduces weak points prone to corrosion and loosening, significantly enhancing the overall reliability and safety of the structure. Composite materials are prioritized as the main material for the supports and sidewalk treads. These materials are lightweight, high-strength, and possess excellent corrosion resistance, enabling maintenance-free operation throughout their entire lifespan. They are particularly suitable for harsh environments such as marine environments, with a service life far exceeding that of traditional steel and concrete. The construction method emphasizes simplicity and efficiency. Precise positioning via embedded parts necessitates only simple on-site operations such as plugging and tightening components, significantly reducing the labor intensity and technical difficulty of on-site work, shortening the construction period, and minimizing the risks associated with working at heights. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a top view of the present invention; Figure 3 This is a cross-sectional schematic diagram of the composite material of the present invention; Figure 4 This is a schematic cross-sectional view of the pedestrian walkway tread composite material of the present invention; Figure 5 This is a schematic diagram of the support structure according to Embodiment 1 of the present invention; Figure 6 This is a schematic diagram of the embedded part structure in Embodiment 1 of the present invention; Figure 7 This is a schematic diagram of the interface of the composite material used in Embodiment 1 of the present invention; Figure 8 This is a schematic diagram of the support structure in Embodiment 2 of the present invention; Figure 9 This is a schematic diagram of the transition sleeve structure in Embodiment 2 of the present invention; Figure 10 This is a schematic diagram of another interface of the composite material used in Embodiment 2 of the present invention.

[0017] In the diagram: 1. Bracket; 11. Vertical brace; 12. Horizontal brace; 13. Transition sleeve; 2. Pedestrian walkway tread; 3. Horizontal railing; 4. Embedded parts; 41. Embedded parts for horizontal brace; 42. Embedded parts for vertical brace; 5. Fastening screws; F01. Outer reinforcing layer; F02. Inner filling layer; F03. Rivet; F04. Inner connector; F05. Internal stiffening layer; F06. Outer covering layer. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0021] Example 1 This embodiment provides a high-durability maintenance access road for bridges. Please refer to [link / reference]. Figures 1 to 6 Its overall structure surrounds the bridge piers and mainly includes: If the embedded part 4 is used, it is used to be pre-embedded on the bridge pier; Several supports 1 are connected to the bridge piers through embedded parts 4. Each support 1 includes a vertical support 11 and a horizontal support 12. One end of the horizontal support 12 is connected to the middle of the vertical support 11, and the other end is connected to the embedded part 4. The bottom end of the vertical support 11 is connected to the embedded part 4. Pedestrian walkway slab 2, for laying on the upper surface of the flat brace 12; and Horizontal railing 3, used for installation on vertical support 11; Among them, the bracket 1 and the embedded part 4, the vertical support 11 and the horizontal support 12, and the horizontal railing 3 and the vertical support 11 are all connected by a prefabricated plug-in structure.

[0022] Specifically, the sidewalk paving 2 is formed by multiple sets of paving paving circumferentially to form a racetrack-shaped structure. The paving paving is composed of standard straight edge sections and arc-shaped section units. The support 1 and the sidewalk paving 2 have rectangular cross sections, the horizontal railing 3 has a circular cross section, the internal cross section of the embedded part 4 is consistent with the cross section of the support 1, and the external cross section can be rectangular or circular. The embedded part 4 is divided into a flat brace embedded part 41 connected to the flat brace 12 and a vertical brace embedded part 42 connected to the vertical brace 11. Both are made of 316L stainless steel, and the cross-section of the internal hole matches the cross-section of the corresponding support rod to form an interlocking fit. The flat brace 12 in the bracket 1 is inserted into the internal hole of the flat brace embedded part 41 at the end near the pier, and the flat brace 12 is inserted into the hole in the middle of the vertical brace 11 at the end away from the pier, and is fixed by the fastening bolts of the bracket 1. The bottom of the vertical brace 11 is inserted into the internal hole of the vertical brace embedded part 42, the through hole in the middle is assembled with the flat brace 12, and the three layers of through holes in the upper part are assembled with the horizontal railing 3. The sidewalk step 2 is evenly laid on the flat brace 12 in a circumferential direction and is connected and fixed by the step slab fastening screws 5.

[0023] The support frame 1 and the sidewalk tread 2 are made of composite materials, which are either sandwich structures or stiffened structures. The sandwich structure includes an outer reinforcing layer F01 made of metal and an inner filling layer F02 made of rigid polyurethane foam. The stiffening structure includes an outer covering layer F06 made of fiber-reinforced composite material and an inner stiffening layer F05 made of metal sheet.

[0024] Specifically, support 1 adopts a composite material sandwich structure. For example... Figure 3 As shown, the outer reinforcing layer F01 is a duplex stainless steel pipe with a wall thickness of 1.2-5mm; the inner filling layer F02 is rigid polyurethane foam with a density of 300-500g / cm³. 3 This structure combines the strength of stainless steel with the lightweight and fully filled properties of polyurethane, making it suitable for filling and supporting, preventing local buckling of the stainless steel tube wall under pressure, and significantly reducing the self-weight of the component.

[0025] The pedestrian walkway paving 2 adopts a reinforced composite material structure. For example... Figure 4 As shown, the internal stiffening layer F05 is a 2-5mm thick duplex stainless steel plate, which serves as the main bending skeleton; the external cladding layer F06 is a fiber-reinforced composite material, which is formed by pultrusion or molding process. Its surface can be integrally molded with anti-slip texture, and the composite material itself has excellent weather resistance and insulation. This structure provides excellent load-bearing capacity and wear-resistant and anti-slip performance.

[0026] The vertical support 11 of bracket 1 has a bent structure, such as Figure 5 As shown, the segments are a vertical section, a diagonal brace section, and a horizontal section. The angle θ between the vertical section and the diagonal brace section is between 110° and 130°. The through-hole size on the vertical section is the same as the cross-section of the horizontal brace 12. In this embodiment, a vertical section and a diagonal brace section forming a 120° angle with the vertical section are formed to provide better lateral stability. The bottom of the vertical brace 11 is directly inserted into the vertical brace embedded part 42. One end of the horizontal brace 12 is inserted into the horizontal brace embedded part 41, and the other end passes through the through-hole preset in the middle of the vertical section of the vertical brace 11 and is locked with high-strength stainless steel bolts to form a stable triangular support structure.

[0027] In addition, such as Figure 7 As shown, at the joint of the composite component, the inner filling layer F02 is shorter than the outer reinforcing layer F01. It is embedded in the joint by an inner connector F04 and fixed with a rivet F03 to ensure a tight connection and strength transfer.

[0028] In this embodiment, each set of pedestrian walkway pavers 2 consists of 2 straight edge segments and 2 curved segments, and the horizontal railing 3 consists of 3 sets of railings. They are laid on the upper surface of all the horizontal supports 12 on site. Adjacent pavers are spliced ​​together by special internal connectors F04 and stainless steel rivets F03, and finally fixed to the horizontal supports 12 by pavers fastening screws 5.

[0029] The horizontal railing 3 uses three Φ50mm stainless steel round tubes, which are passed through the three layers of through holes reserved on the upper part of all vertical supports 11 during installation. The railing joints are connected with internal sleeves and fixed with rivets F03.

[0030] The installation method for a high-durability bridge maintenance access provided by this invention includes the following steps: Step S1: Installation of embedded part 4; During the stage of binding the steel cage of the bridge pier, the flat brace embedded part 41 and the vertical brace embedded part 42 are combined into an integral module by the positioning jig, hoisted to the design position and welded firmly to the main steel reinforcement; Before pouring concrete, the opening of the embedded part 4 is sealed with waterproof tape. Step S2: Installation of bracket 1; After the concrete of the bridge pier has been cured and reached the design strength, clean the holes of the embedded part 4. The installers use a simple lifting tool to hoist the prefabricated vertical support 11 into place, so that its bottom is inserted into the vertical support embedded part 42; then, pass the horizontal support 12 through the through hole of the vertical support 11 and insert its other end into the horizontal support embedded part 41; finally, use a torque wrench to tighten the fastening bolts of bracket 1 to the design torque to complete the installation of one bracket 1 unit; repeat this process to complete the installation of all brackets 1. Step S3: Laying sidewalk treads 2; hoist the tread unit onto the installed support platform 1 and lay it in the order of "straight first, then curved" or the drawing; use the inner connector F04 to align the adjacent treads and rivet them with the hand-held rivet gun F03. After all treads are laid and connected, fix the treads to the flat support 12 below with self-tapping screws. Step S4: Install the horizontal railing 3; starting from one end, pass the long horizontal railing 3 through the reserved holes of all the vertical supports 11 in sequence; at the joint position, use the inner sleeve for centering connection and fix it with rivets F03 to form a continuous and smooth handrail.

[0031] For components such as bracket 1, first bend the duplex stainless steel pipe according to the design drawings, then preheat and pour polyurethane resin. After it foams and cures, cut and process through holes as needed.

[0032] Example 2: This embodiment is an optimization of embodiment 1, such as... Figures 8-10 As shown.

[0033] like Figure 8 and Figure 9 As shown, the vertical support 11 is bent into two sections, namely the vertical section and the diagonal support section, which is suitable for the case where the vertical support embedded part 42 is installed vertically. In order to reduce the local stress at the connection between the horizontal support 12 and the vertical support 11, a transition sleeve 13 is added. The horizontal support 12 passes through the transition sleeve 13 and then connects to the vertical support 11.

[0034] like Figure 10 As shown, a different composite material interface method is used. At the joint, the inner filling layer F02 of one side of the component is longer than the outer reinforcing layer F01, and is directly inserted into the cavity formed by the inner filling layer F02 of the other side being shorter than the outer reinforcing layer F01, and then fixed with rivets F03. This design eliminates the need for additional internal connectors F04, further simplifying the structure.

[0035] In summary, the present invention provides a high-durability bridge maintenance access road and its construction method. Through innovative structural design, advanced composite material application, and optimized construction process, it successfully solves the core problems of poor durability, complex installation, and high maintenance costs of existing maintenance access roads. This invention is not only safe and reliable, achieving maintenance-free operation throughout its entire life cycle, but also significantly improves on-site installation efficiency and reduces construction difficulty and risks.

[0036] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should recognize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-durability maintenance access road for bridges, characterized in that, include: If the embedded parts are to be used, they are to be pre-embedded on the bridge piers; Several supports are provided, which are connected to the bridge piers through the embedded parts. Each support includes a vertical brace and a horizontal brace. One end of the horizontal brace is connected to the middle of the vertical brace, and the other end is connected to the embedded part. The bottom end of the vertical brace is connected to the embedded part. Sidewalk treads are used to be laid on the upper surface of the flat brace; as well as A horizontal railing for installation on the vertical support; The bracket and the embedded part, the vertical support and the horizontal support, and the horizontal railing and the vertical support are all connected by a prefabricated plug-in structure.

2. The high-durability bridge maintenance access road according to claim 1, characterized in that, The support frame and / or sidewalk treads are made of composite materials.

3. The high-durability bridge maintenance access road according to claim 2, characterized in that, The composite material is a sandwich structure or a reinforced structure; the sandwich structure includes an outer reinforcing layer made of metal and an inner filling layer of rigid polyurethane foam; the reinforced structure includes an outer covering layer of fiber-reinforced composite material and an inner reinforcing layer of metal sheet.

4. The high-durability bridge maintenance access road according to claim 1, characterized in that, The vertical support has a bent structure.

5. The high-durability bridge maintenance access road according to claim 1, characterized in that, The embedded parts include vertical support embedded parts and horizontal support embedded parts. The bottom of the vertical support is inserted into a vertical support embedded part, and one end of the horizontal support is inserted into a horizontal support embedded part, while the other end passes through and is inserted into a through hole opened in the middle of the vertical support.

6. The high-durability bridge maintenance access road according to claim 1, characterized in that, A transition sleeve is provided at the connection between the horizontal brace and the vertical brace to reduce local stress.

7. The high-durability bridge maintenance access road according to claim 2, characterized in that, Adjacent composite material components are connected by internal connectors and rivets.

8. The high-durability bridge maintenance access road according to claim 1, characterized in that, The pedestrian walkway pavers are spliced ​​together from several straight-edged and curved sections, and laid in a circumferential manner to form a racetrack-like structure.

9. A method for installing a high-durability bridge maintenance access as described in any one of claims 1-7, characterized in that, Includes the following steps: S1: Install and fix the embedded parts onto the bridge pier; S2: Insert the vertical and horizontal supports of the bracket into the embedded parts in sequence, and connect and fix the vertical and horizontal supports to complete the bracket installation; S3: Lay the sidewalk treads and fix them on the flat support of the bracket; S4: Pass the horizontal railing through and fix it to the vertical support of the bracket.

10. The installation method according to claim 9, characterized in that, When the support frame and sidewalk treads are made of composite materials, the manufacturing process includes: bending the metal pipes according to the design, preheating and then pouring polyurethane resin, and after the resin has foamed and cured, cutting and processing the connecting holes according to the design length.

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